Roll src/third_party/dawn fee2783cb0b7..f204cf2c4fde (1 commits)

https://dawn.googlesource.com/dawn.git/+log/fee2783cb0b7..f204cf2c4fde

git log fee2783cb0b7..f204cf2c4fde --date=short --first-parent --format='%ad %ae %s'
2020-04-21 rafael.cintron@microsoft.com Add Ref<T> specialization for Result

Created with:
  gclient setdep -r src/third_party/dawn@f204cf2c4fde

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dawn-chromium-autoroll
Please CC cwallez@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:dawn-linux-x64-deps-rel;luci.chromium.try:dawn-mac-x64-deps-rel;luci.chromium.try:dawn-win10-x64-deps-rel;luci.chromium.try:dawn-win10-x86-deps-rel
Bug: None
Tbr: cwallez@google.com
Change-Id: Ia1db679c8a77aaba5a4cedf98ed0985432c73d75
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2159269Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#761133}

DEPS

@@ -298,7 +298,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'dawn_revision': 'fee2783cb0b7b0a03b55e2543513b07c6fba7095',
+  'dawn_revision': 'f204cf2c4fdea8d2209aa6fb555672e696efcb8c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.